i=mv -f $@.tmp $@
o= >$@.tmp && $i

export PERL_HASH_SEED=1

PLANAR_GRAPH=planar-graph

map.plag: generate-plag input-graph Parse.pm 
	./$< input-graph $o

opt.plag: map.plag $(PLANAR_GRAPH)
	sha256sum $^ >.opt.plag.sums.tmp
	cmp .opt.plag.sums.tmp .opt.plag.sums || (	\
	$(PLANAR_GRAPH) RF $<				\
		DUAL					\
		OUTER-F2V OUTER-SPLIT			\
		B T OUTER-F2V OUTER-F12VA		\
		PCO CP RAE 				\
		D 0 NLOPT 				\
		W $@.tmp				\
		&& $i					\
		&& mv -vf .opt.plag.sums.tmp .opt.plag.sums )

#map.ps: map.dot
#	neato -Tps $^ $o